Me too Jan, thank you.
I was also passing a list via the template loop component attribute 'source' as
well, and I was also wrapping it with ${} - I've obviously spent too long using
the JSP EL! This would be a good gotcha to add to the wiki or even possibly the
T5 documentation...?
Anyway it looks like I was completely wrong about the loop component then. I
could still use an explanation of volatility & forms though if anyone can point
me in the right direction.
> -----Original Message-----
> From: Jan Vissers [mailto:[EMAIL PROTECTED]
> Sent: 18 April 2008 16:06
> To: Tapestry users
> Subject: Re: Could not find a coercion from type java.lang.String to
> type com.****.lighting.guidecontrol.view.BreadcrumbBean
>
> Spot on! Now I also understand why the .tml passing didn't work. This
> is
> a great 'a-ha' moment for me!
>
> -J.
> On Fri, 2008-04-18 at 17:03 +0200, Chris Lewis wrote:
> > Ok I think I see the problem. In your layout replace this:
> >
> > t:breadCrumbs="${basePage.breadCrumbHolder.model}"
> >
> > with this:
> >
> > t:breadCrumbs="basePage.breadCrumbHolder.model"
> >
> > Notice the lack of ${}. ${} is trying to convert it to a string,
> which
> > it's not. When passing params to components you don't use expansions,
> > what you want is the object property from the class. The default
> binding
> > prefix for params is "prop" which is what you want in this case.
> >
> > Jan Vissers wrote:
> > > I think I'm getting a bit further now - sorry to spam this list by
> the
> > > way...
> > >
> > > If I pass the breadCrumb model in the Component class instead via
> the
> > > Component Template something is happening.
> > >
> > > So instead of:
> > > <t:heading t:id="heading"
> > > t:breadCrumbs="${basePage.breadCrumbHolder.model}" />
> > >
> > > I do in .java
> > > @Component(inheritInformalParameters = true, parameters =
> > > {
> "loginPage=inherit:loginPage","breadCrumbs=basePage.breadCrumbHolder.mo
> del" })
> > >
> > >
> > >
> > > On Fri, 2008-04-18 at 16:47 +0200, Jan Vissers wrote:
> > >
> > >> The layout component that passes in the 'breadCrumb' model to the
> > >> 'heading' component which should render the breadcrumbs...
> > >>
> > >>
> > >> <?xml version="1.0" encoding="utf-8"?>
> > >> <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
> > >> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>
> > >> <html xmlns="http://www.w3.org/1999/xhtml";
> > >> xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd";>
> > >> <head>
> > >> <meta http-equiv="Content-Type"
> > >> content="text/html;charset=utf-8" />
> > >> <link rel="shortcut icon" href="favicon.ico" />
> > >> <title>${title}</title>
> > >> </head>
> > >> <body>
> > >> <div id="container">
> > >> <t:branding t:id="branding" />
> > >> <t:heading t:id="heading"
> > >> t:breadCrumbs="${basePage.breadCrumbHolder.model}" />
> > >> <t:body />
> > >> <t:copyright t:id="copyright" />
> > >> </div>
> > >> </body>
> > >> </html>
> > >>
> > >> On Fri, 2008-04-18 at 16:43 +0200, Chris Lewis wrote:
> > >>
> > >>> And that is the part I want to see, from the template code which
> you
> > >>> still haven't shared ;-). What I'm referring to is your .tml file
> where
> > >>> you use this component.
> > >>>
> > >>> Jan Vissers wrote:
> > >>>
> > >>>> In the snippet below if I change:
> > >>>> public List<BreadcrumbBean> getBreadCrumbs()
> > >>>>
> > >>>> and let it return a freshly created list. The loop construct
> works.
> > >>>> However via the @Parameter (passing it it) doesn't.
> > >>>>
> > >>>> -J.
> > >>>>
> > >>>>
> > >>>> On Fri, 2008-04-18 at 16:27 +0200, Jan Vissers wrote:
> > >>>>
> > >>>>
> > >>>>> Here it is:
> > >>>>>
> > >>>>> import java.util.List;
> > >>>>>
> > >>>>> import org.apache.log4j.Logger;
> > >>>>> import org.apache.tapestry.annotations.Parameter;
> > >>>>>
> > >>>>> import com.philips.lighting.guidecontrol.view.BreadcrumbBean;
> > >>>>>
> > >>>>> /**
> > >>>>> * The heading component holds the following pieces of Heading
> > >>>>> information.
> > >>>>> *
> > >>>>> * <pre>
> > >>>>> * <div id="heading">
> > >>>>> * <ul id="breadcrumbs">
> > >>>>> * <li
> > >>>>> id="prefix">[ &aposyou-are-here&apos
> ]>/li>
> > >>>>> * { when loginPage }
> > >>>>> * <li>&aposlogin-
> page&apos</li>
> > >>>>> * { when not loginPage }
> > >>>>> * { for all crumbs }
> > >>>>> * { if crumb is last }
> > >>>>> * <li>[ crumb text ]</li>
> > >>>>> * { if crumb is not last }
> > >>>>> * <li><a href="[ crumb
> > >>>>> link ]">[ crumb text ]</a> > </li>
> > >>>>> * </ul>
> > >>>>> * </div>
> > >>>>> * </pre>
> > >>>>> *
> > >>>>> * @author Cumquat Information Technology
> > >>>>> *
> > >>>>> */
> > >>>>> public class Heading {
> > >>>>> private static final Logger logger =
> > >>>>> Logger.getLogger(Heading.class);
> > >>>>>
> > >>>>> @Parameter
> > >>>>> private boolean loginPage = false;
> > >>>>>
> > >>>>> @Parameter
> > >>>>> private List<BreadcrumbBean> breadCrumbs;
> > >>>>>
> > >>>>> private int index;
> > >>>>>
> > >>>>> private BreadcrumbBean crumb;
> > >>>>>
> > >>>>> public boolean isLoginPage() {
> > >>>>> return loginPage;
> > >>>>> }
> > >>>>>
> > >>>>> public List<BreadcrumbBean> getBreadCrumbs() {
> > >>>>> return breadCrumbs;
> > >>>>> }
> > >>>>>
> > >>>>> public void setBreadCrumbs(List<BreadcrumbBean>
> breadCrumbs) {
> > >>>>> logger.debug("Setting breadcrumbs: "+breadCrumbs);
> > >>>>> this.breadCrumbs = breadCrumbs;
> > >>>>> }
> > >>>>>
> > >>>>> public int getIndex() {
> > >>>>> return index;
> > >>>>> }
> > >>>>>
> > >>>>> public void setIndex(int index) {
> > >>>>> this.index = index;
> > >>>>> }
> > >>>>>
> > >>>>> public BreadcrumbBean getCrumb() {
> > >>>>> return crumb;
> > >>>>> }
> > >>>>>
> > >>>>> public void setCrumb(BreadcrumbBean crumb) {
> > >>>>> this.crumb = crumb;
> > >>>>> }
> > >>>>>
> > >>>>> public boolean isLastCrumb() {
> > >>>>> return (index == breadCrumbs.size() - 1);
> > >>>>> }
> > >>>>>
> > >>>>> }
> > >>>>>
> > >>>>> On Fri, 2008-04-18 at 16:22 +0200, Chris Lewis wrote:
> > >>>>>
> > >>>>>
> > >>>>>> We still haven't seen your template code, where you declare
> this
> > >>>>>> component and pass it the model. I can't be sure but perhaps
> it will
> > >>>>>> shed some light...
> > >>>>>>
> > >>>>>> Jan Vissers wrote:
> > >>>>>>
> > >>>>>>
> > >>>>>>> The problem is somehow related to the way my page and
> component are
> > >>>>>>> hooked up/working.
> > >>>>>>>
> > >>>>>>> For testing purposes I now create the Breadcrumb list in the
> component
> > >>>>>>> itself, simply returning a created list on the fly whenever
> > >>>>>>> getBreadCrumbs() is called. This works as expected!!!
> > >>>>>>>
> > >>>>>>> Strange thing is that via passing the 'model' to the
> component via a
> > >>>>>>> page binding the same thing doesn't work. This must be a
> bug?!
> > >>>>>>>
> > >>>>>>> -J.
> > >>>>>>>
> > >>>>>>> On Fri, 2008-04-18 at 15:59 +0200, Chris Lewis wrote:
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>> That looks good to me. I don't have an example I can look at
> with a
> > >>>>>>>> loop, but I do have one with a t:grid in which I reference a
> bean
> > >>>>>>>> property of a custom class. It's possible that the two are
> vastly
> > >>>>>>>> different, but I wouldn't think that.
> > >>>>>>>>
> > >>>>>>>> Jan Vissers wrote:
> > >>>>>>>>
> > >>>>>>>>
> > >>>>>>>>
> > >>>>>>>>> On the component I have:
> > >>>>>>>>>
> > >>>>>>>>> @Parameter
> > >>>>>>>>> private List<BreadcrumbBean> breadCrumbs;
> > >>>>>>>>>
> > >>>>>>>>> This is passed in via the containg (base)page.
> > >>>>>>>>> And in the same component class I have:
> > >>>>>>>>>
> > >>>>>>>>> private BreadcrumbBean crumb;
> > >>>>>>>>>
> > >>>>>>>>> public BreadcrumbBean getCrumb() {
> > >>>>>>>>> return crumb;
> > >>>>>>>>> }
> > >>>>>>>>>
> > >>>>>>>>> public void setCrumb(BreadcrumbBean crumb) {
> > >>>>>>>>> this.crumb = crumb;
> > >>>>>>>>> }
> > >>>>>>>>>
> > >>>>>>>>> This should be right, right?
> > >>>>>>>>>
> > >>>>>>>>> -J.
> > >>>>>>>>>
> > >>>>>>>>> On Fri, 2008-04-18 at 14:00 +0100, nicholas Krul wrote:
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>>> ? is your crumb property of type BreadCrumbBean, or is it
> type String?
> > >>>>>>>>>> should be same as breadCrumbs<?TYPE>
> > >>>>>>>>>>
> > >>>>>>>>>> On Fri, Apr 18, 2008 at 1:56 PM, Chris Lewis
> <[EMAIL PROTECTED]>
> > >>>>>>>>>> wrote:
> > >>>>>>>>>>
> > >>>>>>>>>>
> > >>>>>>>>>>
> > >>>>>>>>>>
> > >>>>>>>>>>
> > >>>>>>>>>>> I can't speak about your t:if bit because I don't know
> what "LastCrumb"
> > >>>>>>>>>>> would be, but assuming that your page class has
> getters/setters (or the
> > >>>>>>>>>>> property is annotated with @Property) for the "crumb"
> property, a getter
> > >>>>>>>>>>> for your "breadCrumbs," and your crumb bean defines a
> "getName" method,
> > >>>>>>>>>>> you *should* be good.
> > >>>>>>>>>>>
> > >>>>>>>>>>> It would be helpful if you can include the exception,
> specifically the
> > >>>>>>>>>>> line it references, etc.
> > >>>>>>>>>>>
> > >>>>>>>>>>> chris
> > >>>>>>>>>>>
> > >>>>>>>>>>> PS the list is good, the IRC channel (irc.freenode.net
> #tapestry) is
> > >>>>>>>>>>> better ;-)
> > >>>>>>>>>>>
> > >>>>>>>>>>> Jan Vissers wrote:
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>> Yep, sure, I may I add - This mailing list is great and
> Tapestry rocks!
> > >>>>>>>>>>>>
> > >>>>>>>>>>>> <t:loop source="breadCrumbs" value="crumb"
> index="index">
> > >>>>>>>>>>>> <t:if test="LastCrumb">
> > >>>>>>>>>>>> ${crumb.name}
> > >>>>>>>>>>>> <t:parameter name="else">
> > >>>>>>>>>>>> <a href="#"
> > >>>>>>>>>>>> t:type="pageLink" ....>${crumb.name}</a>
> > >>>>>>>>>>>> >
> > >>>>>>>>>>>> </t:parameter>
> > >>>>>>>>>>>> </t:if>
> > >>>>>>>>>>>> </t:loop>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>> -J.
> > >>>>>>>>>>>>
> > >>>>>>>>>>>> On Fri, 2008-04-18 at 14:34 +0200, Chris Lewis wrote:
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>> Can you share some code? At least the relevant part
> from template would
> > >>>>>>>>>>>>> be helpful.
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>> chris
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>> Jan Vissers wrote:
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>>
> > >>>>>>>>>>>>>> Hi,
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>> Just to make sure I'm not missing something.
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>> In T4 when I wrote a @For construct I could use
> value="..." as long as
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>> I
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>>>> provided a setter|getter pair for the class involved -
> in this case
> > >>>>>>>>>>>>>> BreadcrumbBean. I want to iterate over a list of beans
> and use each
> > >>>>>>>>>>>>>> instance individually. Now T5 throws up on me with
> this nice coercion
> > >>>>>>>>>>>>>> message. Does this mean I need to contribute my own
> coercion - or is
> > >>>>>>>>>>>>>> there a more simple way? In my case BreadcrumbBean is
> a simple class
> > >>>>>>>>>>>>>> holding three String members.
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>> Thanks (again :-))
> > >>>>>>>>>>>>>> -J.
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>> ------------------------------------------------------
> ---------------
> > >>>>>>>>>>>>>> To unsubscribe, e-mail: users-
> [EMAIL PROTECTED]
> > >>>>>>>>>>>>>> For additional commands, e-mail: users-
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> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>>>>
> > >>>>>>>>>>>> --------------------------------------------------------
> -------------
> > >>>>>>>>>>>> To unsubscribe, e-mail: users-
> [EMAIL PROTECTED]
> > >>>>>>>>>>>> For additional commands, e-mail: users-
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> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>>>
> > >>>>>>>>>>> --
> > >>>>>>>>>>> http://thegodcode.net
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>>>>
> > >>>>>>>>> -----------------------------------------------------------
> ----------
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> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>>>>
> > >>>>>>> -------------------------------------------------------------
> --------
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> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>> ---------------------------------------------------------------
> ------
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> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
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> > >>>>
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> > >>
> > >>
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